# Decibel meter vs BLU Audit

The clearest difference is in-app purchases: BLU Audit at none against Decibel meter's 3. BLU Audit also leads on ads (none vs shown) and update cadence (every 4 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel meter sells 3 in-app purchases, starting at $1.99 per 7 days. BLU Audit asks for nothing beyond the download.

Decibel meter ships an update every 2 months, BLU Audit every 4 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Decibel meter | BLU Audit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/decibel-meter-db-meter-noise/id1673352003/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 64 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alexandr Zelensky](https://appshunter.io/developer/1540163645) | [J2 Light Inc.](https://appshunter.io/developer/1420390088) |

## What reviewers say

### Decibel meter

[App page](https://appshunter.io/ios/app/decibel-meter-db-meter-noise/id1673352003)

Measure sound levels in your environment with this easy-to-use noise meter. Get accurate decibel readings, view real-time graphs, and track maximum sound levels. Ideal for concerts, restaurants, homes, and workplaces.

**Highlights:** Accurate decibel measurement, Real-time sound level graph, Maximum recorded sound level display, Easy-to-read interface, SPL meter functionality, Noise assessment tool

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dB Meter Premium | $1.99 | per 7 days |
| dB Meter Premium | $4.99 | per month |
| Special Offer - 50% Discount | $19.99 | per year |


### BLU Audit

[App page](https://appshunter.io/ios/app/blu-audit/id6757886656)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Decibel meter free?

Decibel meter is free to download, with in-app purchases available.

### Is BLU Audit free?

BLU Audit is free to download, with no in-app purchases.

### Do Decibel meter or BLU Audit have ads?

Decibel meter shows ads; BLU Audit does not.

### Which is updated more often, Decibel meter or BLU Audit?

Decibel meter ships an update every 2 months, and BLU Audit every 4 weeks. Most recently, Decibel meter was updated on November 3, 2026 and BLU Audit on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*